In a bowl, combine olive oil, salt, and black pepper. Add the Portobello mushrooms and sliced onions. Marinate for 15 minutes. Grill or smoke the mushrooms and onions over medium heat for about 10-12 minutes, until tender.

Make Strawberry Chipotle Sauce

Combine Ingredients

In a small saucepan, mix strawberry preserves, chipotle peppers, apple cider vinegar, and garlic powder. Simmer on low heat for 5 minutes until well combined.

Prepare Roasted Garlic Mayo

Blend Together

In a bowl, mix mayonnaise, roasted garlic cloves (mashed), and lemon juice until smooth.

Make Kale Slaw

Toss Ingredients

In a large bowl, combine chopped kale, grated carrot, apple cider vinegar, olive oil, and salt. Toss until all ingredients are well coated.

Prepare Crispy Yams

Roast Yams

Preheat the oven to 425°F (220°C). Cut yams into thin wedges, toss with olive oil and salt, and roast in the oven for 25-30 minutes until crispy.

Assemble the Burger

Layer and Serve

On each potato bun, layer the grilled mushrooms and onions, drizzle with strawberry chipotle sauce, spread roasted garlic mayo, add a handful of kale slaw, top with crispy yams, and close the bun. Serve immediately.